Maternal Diabetes Fetal/Neonatal Placenta, membranes and umbilical cords
Pregnancy-induced or chronic hypertension Fetal or neonatal death Infarctions, including infarction of the placental bed
Premature Rupture of Membranes Twin pregnancy Placental abruption
Preterm birth (<36 weeks) Prematurity Vasa previa
Post-term birth (>42 weeks) Intrauterine growth retardation (IUGR) Placenta previa
Poor obstetric history Hydrops Any abnormal appearance of the umbilical cord membranes or of the placenta
Unexplained fever or infection Congenital anomalies  
Oligohydramnios Fetal/neonatal erythroblastosis  
History of drug use Not reassuring fetal status / transfer to neonatal care unit  
  Ominous heart rate  
  Meconium discharge  
  Low Apgar score (<5 at 1' and <7 at 5')  
Table 1: Indications for anatomopathological study of the placenta.